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This letter proposes an improved nearest-level modulation (NLM) method to enhance the quality of output voltage of a modular multilevel converter (MMC) with the low amount of submodules, as well as restrain the voltage fluctuation of the submodules. By adding a small offset, which is alternating at the double fundamental frequency to the reference signals, a small phase shift of the step-changing...
High-voltage capacitor charging power supply (HV-CCPS) is an important part of the capacitive pulsed power system. This paper mainly focuses on the analysis, design and implementation of HV-CCPS, which employs the phase-shifted series resonant converter (PS-SRC) as topology. When PS-SRC operates at over-resonant state, it has three operation modes. The electric characteristics and boundary conditions...
High energy density high-voltage metallized film capacitor is one of the most suitable energy storage elements in pulsed power system, such as Electromagnetic Gun (EMG) system. But the voltage drop at high voltage is an inherent problem of metallized film capacitor, which will affect the launching precision of EMG system. To improve the launching precision, this paper mainly focuses on the voltage...
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